Q: Why does animation break when switching between browser tabs in Safari?
A: Animation delay does not work well on Safari. To fix the issue, add a keyframe at the beginning of each animated layer.
Q: What should I do when animation pause event does not work on iOS?
A: One workaround is to duplicate the page so there are two pages. In the second page, update the page to have the content to show at pause. Instead of pause, go to the second page.